/ Dictionary / Index L lineation: Meaning and Definition of Find definitions for: lin•e•a•tion Pronunciation: (lin"ē-ā'shun), [key] — n. an act or instance of marking with or tracing by lines. a division into lines. an outline or delineation. an arrangement or group of lines. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. See also: lineation (Thesaurus) lineate linebacker Related Content Daily Word Quiz: tenacious Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language